noun he·li·o·don \ˈhēlēəˌdän\

Definition of heliodon



  1. :  a device consisting of a pivoted platform and a spotlight on a vertical track used to simulate sun and shadow orientation for any latitude and day of year for a proposed building

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of heliodon

New Latin, from 1heli- + -odon (from Greek hodos way, path) — more at cede

Seen and Heard

What made you want to look up heliodon? Please tell us where you read or heard it (including the quote, if possible).


to cast off or become cast off

Get Word of the Day daily email!